DE3838186A1 - METHOD AND DEVICE FOR FILLING A HOLE - Google Patents

Description

The present invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 10.

The present invention relates to a ver drive to fill a borehole where the first process step drilling a hole under Using a tubular drill pipe, through which a flushing medium during the drilling process is carried out by means of at least one Opening in a crusher in a ring shaped space emerging from the borehole and the Outer surface of the drill pipe is defined and this serves to smash material from the borehole transport.

A borehole produced in the above manner can in a variety of different ways in mining can be used in the sense of the present invention. First, a borehole with a solder or Ab sealing material to be filled in the borehole Anchor pit strut bolts. Second the borehole can be used to make bad Rock by injecting a reinforcing material to brace in the crevices through the borehole clog. After this process, of course, it is too possible using the aforementioned fixation of a bolt Using a soldering material. A third  Area of application is the filling of a drill with an explosive. In any case, the filler used in liquid form in front. In the first two cases mentioned primarily the task, the strength and density of the To improve rock, while in the third case the actual mining is carried out.

The known prior art deals with large some with fixation procedures for anchoring bolts. So describes for example the Finnish patent 15 277 a method of anchoring bars in rock or rock. This procedure involves use of a drill pipe provided with a drill bit is and vice versa during the drilling process from a pipe ben is. The pipe is removable on the drill string and attached to the drill bit. While performing a drilling operation is carried out in the space that is Anchorage rods and the tube is limited Flushing medium is supplied and after the drilling process this space filled with a binder. During the Feeding a binder is the tube of the Borehole withdrawn while the drill pipe was shared remains with the drill bit in the borehole and as Ver anchor rod acts, which by the effect of the Is anchored in the borehole.

When performing the be in the aforementioned patent written procedure you need special Drill rods and drill bits or drill heads and the  only purpose for which this method can be used is the anchorage of such bars.

On the other hand, a method is also known for which the fixation of an anchoring bolt causes a hole with a per kiss drill drills, then the drill pipe pulls out of the borehole and into the borehole introduces separate filler feed pipe. By this pipe is filled with a filler in the borehole brings, after which an anchoring bolt in the with the Filler filled hole is inserted.

The technology described above is from the inappropriate for the following reasons:

• - In a layer of broken rock, which one always in areas where a reinforcement is necessary, the introduction is designed of a pipe into the borehole is difficult because the Ge stone material slips into the hole. About that there is also a risk that the pipe jammed in the borehole for the same reasons.
• - The insertion of a pipe exactly at the end of the Boreholes require good luck and only succeed by chance, especially when there is a borehole in one uneven terrain is drilled because of the un flat terrain, the drill pipe from the nor paint middle layer shifts out and that  The drill pipe also bends in the initial phase.
• - Additives which are specifically used in Be are needed and serve to serve one Set a solder or sealing material cannot accelerate in a feed pipe be used because the material sets can already take place in the feed pipe. After a feed operation, that also contains Mixer still a part of the mixed mass, that sets very quickly. Mixing one Additive with a solder material is also incomplete because a mechanical mixture is not is achieved. Even the rotation of an amplifier kungsbolzens, which a mixing in a lower should cause a downward hole that with a solder or binding agent is filled, does not give the desired result, as it creates voids around the bolt can come in a borehole while the bandage medium runs out of the borehole.
• - The circulation of a solder or bonding agent in a supply line for prevention tying also does not have the desired Results brought, since it enters the borehole ting and required portion of a feed system not pumped around or circulated becomes.  
• - The introduction of a feed tube for a solder or setting agent as a separate process is a unnecessary and time consuming process.

The present invention is therefore the object based on a novel and unexpected well filling process to create that in all filling processes be used after the drilling process can, regardless of whether filling with a solder or Binder is used to anchor a bolt serves whether a reinforcement material for the rock or the rock is to be introduced or whether an explosive material is provided for introduction.

This object is achieved by the counter state of claim 1 solved. Particularly preferred Developments of the invention are in the dependent claims Chen described.

The invention further aims to provide a device that involves filling wells in enables the above-mentioned objective. These Task is by the subject of claim 10 solved. Preferred developments of the device are described in subclaims 11 to 16.

With the invention, a method for filling a Borehole created that essentially is characterized in that a tubular drill pipe is used to fill a filler in a hole and /  or a layer of soil or stone covering the hole surrounds to bring. The procedure enables one very simple, quick and complete filling a borehole. A normal device can be used as the basic device Percussion or rotary drilling rig used to which a filler feed arrangement is attached fits. The implementation of the Ver driving prevents on the one hand that drill rods ver must be applied specifically for anchoring purposes are constructed and on the other hand that a separate pipe must be placed in a borehole, after the drill pipe is removed from the borehole has been.

Especially in special areas of application preferably follows a displacement of the drill pipe or the boring bar during the feeding of a fill substance, the shift in one direction follows, which runs opposite to the drilling direction. In addition to this, in order to avoid Air pockets in a filler feed the same preferably starting at the bottom of the borehole. About that In addition, it is preferred to mix the Filler that the drill pipe during a fill process is rotated.

As mentioned above, the invention is concerned with also with a device for carrying out the inventions method according to the invention. The following description a special embodiment based on the  lying drawing serves to further explain the Invention.

Fig. 1 shows a cross-sectional view of a drilling machine designed according to the invention, this cross-section running along the line AA of FIG. 2.

FIG. 2 shows a section along the line BB from FIG. 1.

Fig. 3 shows a diagram for the hydraulics of the device shown in Figs. 1 and 2.

The device shown in the drawings contains a feed housing 2 which is either fixedly or portablely held on the front region of a drilling machine 1 . The feed housing 2 contains a substantially cylindrical chamber I, which surrounds a neck part 3 of the drill. The chamber I serves for the supply of a filler as well as a rinse water in a channel 4 in the neck part 3 via connecting channels 5 which extend between the chamber I and the channel 4 . The feed housing 2 further contains a chamber II which surrounds the neck part 3 in a similar manner. The chamber II is arranged between the drilling machine 1 and the chamber I. A flushing medium, especially water, is introduced into chamber II during the pumping of a filler. The chamber I is provided on both sides of the same with seals 6 a , 6 b , which seal the chamber I against the neck part 3 . A rinsing medium, especially water, which is introduced into the chamber II for the duration of the supply of a filler, prevents the passage of the solder or bonding agent to the bearings 6 c in the event of possible damage to the seal (primarily the seal 6 a ) front area of the drill 1 . In the present embodiment, the chamber II is sealed against the front wall of the drilling machine and the rear wall of the chamber II is produced from the front wall of the drilling machine 1 .

A water jet entering chamber II will led out of the chamber again, for example in a vessel. The sealing arrangement described above This prevents the filler from escaping from the Chamber I in chamber II and on the other hand also in the Surroundings.

The feed housing 2 further contains a Ven valve 7 , which controls the flow of the filler and the rinsing water and / or of expelled air in various stages in the implementation of the method.

Fig. 3 shows a hydraulic diagram, to which reference is made in the following. In the position shown in the diagram, the device is about to deliver a filler through the channel 4 in the neck part 3 into a bore 9 of a boring bar 8 . The end of the boring bar 8 carries a crushing tool 10 or the like, which is provided with openings 11 in order to discharge a filler into a borehole PR . Under certain circumstances, the boring bar 8 can be provided with additional channels adjacent to the comminution tool 10 . Water or compressed air is fed along a line 12 to the valve 7 via a three-way valve 13 . In a two-th operating position of the three-way valve 13 , compressed air can be introduced through the chamber I into the bore 9 of the boring bar 8 during the drilling process. An operating valve 14 controls the valve 7 by means of the pressure of a hydraulic pump 24 in the position shown in FIG. 2, the water being supplied through line 12 via a throttle 15 located downstream of valve 7 (see FIG. 1). The purpose of the throttle 15 is to be seen in the fact that this produces a spray-like water flow into the chamber II, in order in this way to effect a more effective flushing of the neck part 3 within the boundary of the chamber II. Furthermore, the operating valve 14 is used to control a circulation valve 16 into the position shown by means of the pressure of the hydraulic pump 24 . Similarly, the hydraulic pump 24 caused by a reversible counter pressure valve 17, a pressure fluid flow for a hydraulic motor 19 of a filler pump 18 to produce a pumping action. From the circulation valve 16 there is a connection to the valve 7 along an outlet piping system 20 a , 20 b , which consists of two pipes. During the pumping of a filler, both dispensing tubes 20 a , 20 b cause the filler to be transported to the valve 7 . Downstream of the valve 7 , an additive supply line 23 opens into the filler pump line 21, a valve 22 attached in this being designed such that it prevents the filler from passing into the additive supply line 23 . The above-described operation causes the filler and a possible additive to flow into the chamber I from a filler supply 25 and, in addition, the water flows into the chamber II, for which the line 12 is used.

When the device is switched to an actual drilling operation, the upper block of Betriebsven valve 14 comes into action. In this way, first of all, the hydraulic pump 24 puts the right block of the circulation valve 16 into operation. On the other hand, the right block of the valve 7 is activated with the removal of the control of the left block as soon as the pressure, which predominates in the line 12 , acts on the valve 7 . This builds up a circulation line for the filler 25-18-16-20 a -7-20 b -16-25 and water and / or air flows along line 12 into chamber I. On the other hand, the hydraulic fluid of the hydraulic pump flows 24 to the motor 19 now by means of a throttle control valve 26 . The flow through the reversible counterpressure valve 17 is therefore regulated to a suitable flow rate with regard to the necessary circulation power which is brought about by the hydraulic motor 19 .

FIG. 2 shows in detail the structure of the valve 7 and its associated elements 15 and 22 and their position with respect to the feed housing 2 . The feed housing 2 is provided with an elongated valve chamber 7 a into which a valve body 7 b is fitted, so that it can be displaced in its longitudinal direction. The feed housing 2 is further provided with bores 27 a , 27 b , which are in connection with the opposite ends of the valve chamber 7 a and through which the position of the valve body 7 b is controlled, which is done by means of a control pressure fluid acting on the two Ends of the rod-shaped valve body acts. The valve body 7 b is provided with a recess or circumferential groove 7 c which, when the valve body 7 b assumes the position shown in solid lines in FIG. 2, is aligned with a line 20 ( 20 a , 20 b ), so that A filler and possibly an additive (valve 22 ) is fed into chamber I, which is admixed to the filler downstream of valve 7 . The supply of a flushing medium into the chamber II through the throttle valve 15 , which is attached downstream of the valve 7 , takes place via an annular area 7 d , which is attached in the valve chamber 7 a in the area of the line 12 . As soon as a control pressure fluid causes the valve body 7 b to be shifted into the right-hand position shown in dash-dotted lines in FIG. 2, the line 20 is closed, since the left side of the valve body 7 b closes the line 20 , while the recess or groove 7 c partially in the Area of the line 12 so that the flow of a flushing medium, which starts from the line 12 , is distributed into the chambers I and II.

In connection with the filling process of a hole with a solder or a hardening agent, the operating sequence of the device according to the invention is carried out in the following manner: First, a hole is drilled to a certain depth in the normal way by means of a drilling machine. After the drilling process, the same is ended. Compressed air is applied to the line by rotating the three-way valve 13 counterclockwise from the position shown in FIG. 3. In this way, the flushing water used during a drilling process emerges from the chamber I and from the central bore 9 of the drill rod 8 and from the borehole PR.

The pumping in of a solder or a curing agent is initiated by moving the actuating valve 14 into the pumping position shown in FIG. 3, the hydraulic pressure bringing the valves 7 , 16 and 17 into the position shown in FIG. 2. The oil flows that lead to the motor 19 and along a line SM to an actuating motor, not shown, of the drilling machine 1 are synchronized with a separate distribution valve 26 in such a way that they correspond to one another in such a way that a grinding tool 10 is located in the borehole PR against the drilling direction tion moves at a speed that is equal to or slightly less than the speed at which the solder or hardening agent is filled into the borehole. The drill string is kept rotating during this movement.

After the pumping process starts, the rinse water turns on switched, the water flushing through chamber II, from which the water is on the floor or on a separate vessel emerges.

The pumping process is preferably stopped by means of the actuation supply valve 14 before a borehole is completely filled continuously. After the end of the Pumpvor gear, the hydraulic pressure moves the valve 7 into a position which allows water to enter the chamber I, so that the solder or the hardening mass which is in the chamber I and inside the equipment is located, in front of which water is forced into the PR hole and thereby fills the part of the borehole that was not completely filled. This prevents a mass to be discarded.

When the pumping process is ended by means of the actuating valve 14 , the hydraulic pressure shifts the valves 7 and 16 into a circulation position, the pumping process with a slower pumping rate through the lines 20 a , 20 b back to a container 25 .

If additives are additionally used, they are pumped in by means of the valve 22 , so that they are mixed with a solder or hardening agent. In this case, it is particularly preferred to use the rotation of the drilling machine 1 to mix the additive in the borehole PR .

After a borehole PR has been filled with a solder or hardening agent, a bolt is inserted into it in a conventional manner.

From the above explanations it can be seen that by the present invention a number of advantages over the prior art, especially if a solder or a hardening agent is used.

• - A drill pipe or a drill rod 8 , which serves as a feed pipe for the solder or hardening agent, each together with the grinding tool 10 reaches the bottom of a borehole, regardless of the type of rock in which the borehole is introduced, since all normal basic processes (if necessary, percussion as well as rotation and feeding) are available for this purpose. The operating cycle is faster because some work steps are omitted.
• - A feed line for a solder or an out curing agent does not have to be completely during short breaks are cleaned after  the possibility of circulation is provided is.
• - The supply of an additive to a solder or hardening mass can take place within such a section of a supply line that is rinsed during the drilling process. The length of a drill pipe, which serves as a feed pipe, is suitable for a special borehole PR . This advantage is particularly evident when an extension of the drill pipe is necessary to achieve the desired hole depth.
• - The method and the device for filling a Boreholes also make the possible ability to use preloaded bolts. An additive is only during the early stage of pumping process used so that the bottom area of a The remaining portion of the borehole sets faster than the area in the mouth of the borehole the same. In this way, a bolt can be a Preserve after the area in the ground is cured.
• - The admixture of an additive to a solder or a hardening agent can be effected by rotating a drill pipe. Partial mixing takes place in chamber I after the neck part 3 rotates. This means that the lines 5 perform a rotational movement with the effect that a solder or a hardening agent in the chamber is also subjected to a rotational effect. The final mixing takes place in a borehole when the solder or the setting agent emerges through the openings 11 in the grinding tool 10 . The tip of the cutting tool 10 is provided with projections which further promote the mixing process.
• - During the pumping process of a solder or a hardening agent, a pressure drop in the discharge piping system 20 a , 20 b can be determined, since the flow of a solder or hardening agent is distributed over the two pipes.

Claims (16)

1. A method for filling a borehole, in which the first step is to produce a borehole (PR) using a tubular drill pipe ( 8 ), through which a flushing medium via at least one opening ( 11 ) in a comminution tool ( 10 ) during the drilling process. is fed into an annular area which is defined by the borehole (PR) and the outer surface of the drill pipe ( 8 ) and which serves to discharge shredded material from the borehole, characterized in that the tubular drill pipe ( 8 ) for the supply of a filler into the borehole and / or into the material or rock surrounding the borehole is used. 2. The method according to claim 1, characterized in that the drill string ( 8 ) is moved during the supply of a filler in a direction which is opposite to the drilling direction. 3. The method according to claim 1 or 2, characterized in that the drill pipe ( 8 ) is set in rotation during the supply of a filler. 4. The method according to any one of claims 1 to 3, characterized in that in the final stage of the supply of a filler, a flushing medium, preferably water, is introduced into the drill pipe ( 8 ) to drill the filler from the inside ( 9 ) of the drill pipe ( 8 ) and from the shredding tool ( 10 ). 5. The method according to any one of claims 1 to 4, characterized in that an additive, e.g. a Additive for faster hardening of a solder or from curing agent is supplied to the filler, and that the additive is added to the filler at one point becomes moving at that downstream of that point seen in the direction of the filler, a treatment with a flushing medium is possible. 6. The method according to any one of the preceding claims, characterized in that the filler in the device internal circulation at least during the perio which is subjected to drilling is carried out. 7. The method according to any one of the preceding claims, characterized in that the supply of the filler in the drill pipe ( 8 ) on a neck part ( 3 ) (chamber I) of a drill ( 1 ) via a channel ( 4 ) in the neck part ( 3rd ) he follows. 8. The method according to claim 7, characterized in that a rinse, preferably a water rinse (chamber II) of the neck part ( 3 ) is provided between the drilling machine ( 1 ) and the filler feed guide point. 9. The method according to claim 1 and 7, characterized in that the filler feed point on the neck part ( 3 ) (chamber I) further serves for the supply of a flushing medium which is used during the drilling process. 10. Device for use in filling a borehole and / or in filling material or rock that surrounds the borehole, containing a drilling machine ( 1 ), which is provided with a channel ( 4 ) penetrated neck part ( 3 ) which a drill pipe ( 8 ), which is provided with a bore ( 9 ), can be fastened, characterized in that, aligned with the neck part ( 3 ), a feed housing ( 2 ) is provided which contains at least one chamber (I) which along at least one connecting channel ( 5 ), which is provided in the neck part ( 3 ), communicates with the channel ( 4 ) mounted in the neck part ( 3 ), and that a valve ( 7 ) is provided in the feed housing ( 2 ), wherein the valve ( 7 ) is designed such that it can introduce a medium into the chamber (I) which is required both during the actual drilling process and during the filling process of a borehole. 11. The device according to claim 10, characterized in that between the first chamber (I) and the drilling machine ( 1 ), a second chamber (II) is provided, which preferably bears against the front wall of the drilling machine ( 1 ), the front Wall of the drilling machine forms the rear wall of the chamber (II), and that the inner surfaces of the chambers (I, II) are formed by the outer surface of the neck part ( 3 ). 12. The apparatus according to claim 10 and 11, characterized in that it contains a valve ( 7 ) which, according to an operating mode of the device, is able to in the first chamber (I)

• a) a flushing medium, such as compressed air, which is used during the drilling process,
• b) a filler during the machining of a borehole and
• c) a filler flushing medium, such as water, for flushing the chamber (I), the bore ( 9 ) of the drill pipe ( 8 ) and the openings ( 11 ) of the comminution tool ( 10 ) and in the second chamber (II) a flushing medium, such as water, during the delivery of a filler into the first chamber (I).

13. Device according to one of claims 10 to 12, characterized in that it contains a Zirkulationsven valve ( 16 ) to either either the supply of a filler through the valve ( 7 ) into the chamber (I) or an internal circulation of a filler the valve ( 7 ) using an output piping system ( 20 a , 20 b ), which connects the circulation valve ( 16 ) and the valve ( 7 ), he leaves. 14. Device according to one of claims 10 to 13, characterized in that a feed for an additive is provided downstream of the valve ( 7 ), and that an additive feed line ( 23 ) is provided with a valve ( 22 ) or a similarly acting device, which serves to prevent the filler from entering the additive feed line ( 23 ). 15. The apparatus according to claim 13, characterized in that a water and / or compressed air supply to the valve ( 7 ) along a common line ( 12 ), the line ( 12 ) with a valve ( 13 ), preferably a three-way valve , is provided in order to either let a medium flow through the line ( 12 ) or a certain ratio of different media. 16. Use of the method according to one of claims 1 to 9 and / or the device according to one of claims 10 to 15 for the supply of a solder or a hardening agent in a borehole, in particular for fixing an anchoring bolt in the borehole (PR ) for the treatment of cracks and similar in the material or the rock through which the borehole passes with a filler or for the introduction of an explosive into a borehole.